#pragma once

#include <stdint.h>

#define MULTIBOOT_FLAGS_FRAMEBUFFER (1 << 12)

#define MULTIBOOT_FRAMEBUFFER_TYPE_GRAPHICS 1
#define MULTIBOOT_FRAMEBUFFER_TYPE_TEXT 2

struct framebuffer_info_t
{
	uint64_t addr;
	uint32_t pitch;
	uint32_t width;
	uint32_t height;
	uint8_t  bpp;
	uint8_t  type;
	uint8_t  color_info[6];
};

struct multiboot_memory_map_t
{
	uint32_t size;
	uint64_t base_addr;
	uint64_t length;
	uint32_t type;
} __attribute__((packed));

// https://www.gnu.org/software/grub/manual/multiboot/multiboot.html#Boot-information-format
struct multiboot_info_t
{
	uint32_t flags;
	uint32_t mem_lower;
	uint32_t mem_upper;
	uint32_t boot_device;
	uint32_t cmdline;
	uint32_t mods_count;
	uint32_t mods_addr;
	uint32_t syms[4];
	uint32_t mmap_length;
	uint32_t mmap_addr;
	uint32_t drives_length;
	uint32_t drives_addr;
	uint32_t config_table;
	uint32_t boot_loader_name;
	uint32_t apm_table;
	uint32_t vbe_control_info;
	uint32_t vbe_mode_info;
	uint16_t vbe_mode;
	uint16_t vbe_interface_seg;
	uint16_t vbe_interface_off;
	uint16_t vbe_interface_len;
	framebuffer_info_t framebuffer;
};

extern "C" multiboot_info_t*	g_multiboot_info;
extern "C" uint32_t				g_multiboot_magic;